Missing Road here: Ailsa Trail
Reference: https://www.welland.ca/open/OpendataResp.asp?utitle=Single%20Line%20Road%20Network

Street name is Berwick Trail. Reference: https://www.welland.ca/open/OpendataResp.asp?utitle=Single%20Line%20Road%20Network

Street name is Ganton Trail

Road missing here: Carrick Trail
Reference: https://www.welland.ca/open/OpendataResp.asp?utitle=Single%20Line%20Road%20Network

Clare Ave now continues south and connects with Clare Ave south of Webber Rd. Reference: https://www.welland.ca/open/OpendataResp.asp?utitle=Single%20Line%20Road%20Network

Missing street: Kensington Street
Reference: https://www.welland.ca/open/OpendataResp.asp?utitle=Single%20Line%20Road%20Network

Street name is Colborne Street
Reference: https://www.welland.ca/open/OpendataResp.asp?utitle=Single%20Line%20Road%20Network

The official street name is "First Avenue". Not "1st Avenue". Reference: http://www.welland.ca/open/OpendataResp.asp?utitle=Single%20Line%20Road%20Network

This private road has been renamed Niagara College Boulevard. The name applies to the entire crescent from First Ave to First Ave.

The official street name is Wallace Avenue (no directional suffix). This applies to the entire length of Wallace Avenue both north and south of East Main St. Reference:
http://gis.welland.ca/wims/default.asp?extLyrs=0,1,2,3,4,10,12,13,14,15,16,25,26,30,38,39,46,47,48,49,50&extScale=4.5815614287134698e-001,4.5815614287134698e-001&extCtr=6.4401342966505699e+005,4.7616455217381604e+006&extMode=zoomBox&extCommand=zoomBox&extXY=4,0&dX=&dY=&extViewId=1